Moisture measurement aids ozone generation
A
Michell Instruments product story
Edited by the Engineeringtalk editorial team
Apr 18, 2003
Ozone (O3) is increasingly used to purify water as an alternative to chlorination.
Ozone (O3) is increasingly used to purify water as an alternative to chlorination.
There are three principle applications: production of drinking water; sterilisation of swimming pools; and sterilisation of waste water after treatment and before release into the water cycle.
Chlorination has fallen out of favour as the main purification method due to the significant health risks involved in transporting and handling chlorine.
Because of this implementation of ozone sterilisers has gathered pace in recent years.
Both chlorination and ozonation have the same basic effect, and are extremely powerful oxidising agents; however after doing its job attacking impurities ozone breaks down to oxygen, which is totally harmless.
There are three main reasons to measure the moisture content of the feed air or oxygen to an ozone generator plant.
Moisture can cause arcing in the generator electrodes, which will lead to damage to the electrodes and system walls, and eventually to failure of the ozone generator.
Moisture can cause corrosion of system components due to nitric acid formation, a by-product of arcing, which will lead to the eventual failure of the ozone generator.
Reducing moisture increases ozonation efficiency, because the dryer the feed gas, the more efficient the ozone generator.
For example drying the gas by an extra 20C dew point can improve efficiency by as much as 20%.
Michell Instruments has developed hygrometers that can be used to monitor the moisture content of the feed gas either online (Easidew transmitter or Easidew online, Transmet, Cermet II) or on a spot-check basis (Easidew portable or Cermax).
In conjunction with a dryer control system, an online hygrometer can be used to ensure that the feed gas is as dry as possible, maintaining generator efficiency and extending its life.
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Tel +44 1353 658000
Other Michell Instruments stories
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Dew point transmitter can measure at up to 450 bar
Michell Instruments has updated the Easidew TX dew point transmitter to allow it to take accurate measurements in pressures up to 450 bar or 6500 psi. -
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Transmitter receives new hazard approvals
The Easidew TX IS is certified by FM Approvals for use in hazardous areas to IS/I/1/ABCD/T4 when used with a galvanic isolator for signal power supply connections. -
Transmitter released in intrinsically safe version
Michell Instruments' Easidew TX IS is a low -cost, rugged impedance dew-point transmitter for continuous measurement in industrial gas applications.
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